Rapid and inverse determination of joint normal stiffness based on wave propagation theory

Z. H. Zhang, J. H. Deng, Jianbo Zhu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

How to rapidly and accurately determine joint normal stiffness in rock mass is an important issue in rock engineering. In this work, a new method, i.e., the rapid evaluation method, was introduced to determine the normal stiffness of joints. This method was derived from one-dimensional compressional wave propagation theory. The effect of joints on wave propagation is modelled by displacement discontinuity model as a boundary condition in solving wave equations. Together with input parameters from laboratory or field ultrasonic tests, joint normal stiffness was inversely determined. Direct measurements of joint normal stiffness were performed from uniaxial compression tests. The joint normal stiffness predicted by the rapid evaluation method was then compared with that from direct laboratory measurements. The results show that joint stiffness determined from the rapid evaluation method agreed with their corresponding experimental values, which confirms that this proposed method is valid and feasible.
Original languageEnglish
Title of host publication51st US Rock Mechanics / Geomechanics Symposium 2017
PublisherAmerican Rock Mechanics Association (ARMA)
Pages1601-1604
Number of pages4
Volume3
ISBN (Electronic)9781510857582
Publication statusPublished - 1 Jan 2017
Event51st US Rock Mechanics / Geomechanics Symposium 2017 - San Francisco, United States
Duration: 25 Jun 201728 Jun 2017

Conference

Conference51st US Rock Mechanics / Geomechanics Symposium 2017
CountryUnited States
CitySan Francisco
Period25/06/1728/06/17

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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